Sony WX-GT77UI Service Manual
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Sony WX-GT77UI Service Manual

Fm/am 2din compact disc player
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SERVICE MANUAL
Ver. 1.0 2009.01
• The tuner and CD sections have no adjustments.
AUDIO POWER SPECIFICATIONS
(US model)
CEA2006 Standard
Power Output: 17 Watts RMS × 4 at
4 Ohms <1 % THD + N
SN Ratio: 82 dBA
(reference: 1 Watt into 4 Ohms)
CD Player section
Signal-to-noise ratio: 120 dB
Frequency response: 10 – 20,000 Hz
Wow and fl utter: Below measurable limit
Tuner section
FM
Tuning range:
Except US model:
87.5 – 108.0 MHz
US model:
87.5 – 107.9 MHz
Antenna (aerial) terminal:
External antenna (aerial) connector
Intermediate frequency: 150 kHz
Usable sensitivity: 10 dBf
Selectivity: 75 dB at 400 kHz
Signal-to-noise ratio: 70 dB (mono)
Separation: 40 dB at 1 kHz
Frequency response: 20 – 15,000 Hz
Sony Corporation
9-889-412-01
2009A04-1
Audio&Video Business Group
©
2009.01
Published by Sony Techno Create Corporation
Photo: WX-GT78UI
Model Name Using Similar Mechanism
CD Drive Mechanism Type
Optical Pick-up Name
SPECIFICATIONS
AM
Tuning range:
Except US model:
531 – 1,602 kHz
US model:
530 – 1,710 kHz
Antenna (aerial) terminal:
External antenna (aerial) connector
Intermediate frequency: 25 kHz
Sensitivity: 26 μV
USB Player section
Interface: USB (Full-speed)
Maximum current: 500mA
Power amplifi er section
Outputs: Speaker outputs (sure seal connectors)
Speaker impedance: 4 – 8 ohms
Maximum power output: 52 W × 4 (at 4 ohms)
FM/AM 2DIN COMPACT DISC PLAYER
WX-GT77UI/GT78UI/
GT78UIM
Indian Model
Saudi Arabia Model
General
Output:
Audio outputs terminal (front/rear)
Subwoofer output terminal (mono)
Power antenna (aerial) relay control terminal
Power amplifi er control terminal
Inputs:
Remote controller input terminal
Antenna (aerial) input terminal
Telephone ATT control terminal
Illumination control terminal
BUS control input terminal
BUS audio input terminal
AUX input jack (stereo mini jack)
USB signal input terminal
– Continued on next page –
US Model
WX-GT77UI
E Model
WX-GT78UI
WX-GT77UI/GT78UIM
WX-GT77UI
CDX-M60UI/MR60UI
MG-101Z-188//Q
DAX-25A

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  • Page 1 Separation: 40 dB at 1 kHz Maximum power output: 52 W × 4 (at 4 ohms) Frequency response: 20 – 15,000 Hz FM/AM 2DIN COMPACT DISC PLAYER Sony Corporation 9-889-412-01 2009A04-1 Audio&Video Business Group © 2009.01 Published by Sony Techno Create Corporation...
  • Page 2 COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

  • Page 3: Table Of Contents

    WX-GT77UI/GT78UI/GT78UIM This compact disc player is classifi ed as a CLASS 1 LASER TABLE OF CONTENTS product. The CLASS 1 LASER PRODUCT label is located on the exterior. SERVICE NOTES ........... EXCEPT US MODEL: GENERAL Location of Controls ............Connections ..............

  • Page 4: Service Notes

    WX-GT77UI/GT78UI/GT78UIM SECTION 1 SERVICE NOTES EXTENSION CABLE AND SERVICE POSITION When repairing or servicing this set, connect the jig (extension cable) as shown below. • Connect the MAIN board (CN201) and the SERVO board (CN401) with the extension cable (Part No. J-2502-076-1).

  • Page 5: General

    WX-GT77UI/GT78UI/GT78UIM SECTION 2 This section is extracted GENERAL from instruction manual. • LOCATION OF CONTROLS Location of controls and basic operations Main unit DSPL (display)/SCRL (scroll) button (BACK) button page 11 page 12, 13, 15 To return to the previous display.

  • Page 6: Connections

    WX-GT77UI/GT78UI/GT78UIM • CONNECTIONS RCA pin cord (not supplied) Supplied with the CD changer Insert with the cord upwards. FRONT REMOTE SUB OUT (MONO) AUDIO OUT BUS AUDIO IN REAR FRONT AUDIO OUT from car antenna (aerial) CONTROL IN Fuse (10 A)

  • Page 7: Disassembly

    WX-GT77UI/GT78UI/GT78UIM SECTION 3 DISASSEMBLY • This set can be disassembled in the order shown below. 3-5. SERVO BOARD 3-1. FRONT PANEL ASSY (Page 9) (Page 7) 3-6. CHASSIS (T) SUB ASSY 3-2. SUB PANEL ASSY (Page 10) (Page 8) 3-7.

  • Page 8: Sub Panel Assy

    WX-GT77UI/GT78UI/GT78UIM 3-2. SUB PANEL ASSY screw (+BTT 2.6 × 5) two lock screws (2.6) wire (flat type)(18 core) (CN2) screw (+BTT 2.6 × 5) claw sub panel assy two lock screws (2.6) 3-3. CD MECHANISM BLOCK bracket (CD) CD mechanism block two screws (+BTT 2.6 ×...

  • Page 9: Main Board

    WX-GT77UI/GT78UI/GT78UIM 3-4. MAIN BOARD connection cord (USB) two screws (+P 2.6 × 8) screw screw (+PTT 2.6 × 10) (+PTT 2.6 × 8) screw (+PTT 2.6 × 8) two screws (+PTT 2.6 × 8) CN203 (5P) two screws (+PTT 2.6 × 10)

  • Page 10: Chassis (T) Sub Assy

    WX-GT77UI/GT78UI/GT78UIM 3-6. CHASSIS (T) SUB ASSY two screws (M 1.7 × 2.5) two screws (M 1.7 × 2.5) chassis (T) sub assy claw 3-7. ROLLER ARM ASSY roller arm assy gear (RA1) spring (RAL) washer spring (RAR)

  • Page 11: Chassis (Op) Assy

    WX-GT77UI/GT78UI/GT78UIM 3-8. CHASSIS (OP) ASSY chassis (OP) assy tension spring (KF) two coil springs (damper) (natural) coil spring (damper) (green) slider (R) lever (D) gear (LE1) 3-9. CHUCKING ARM SUB ASSY chucking arm sub assy spring Note: Have this portion receive the chassis.

  • Page 12: Sled Motor Assy

    WX-GT77UI/GT78UI/GT78UIM 3-10. SLED MOTOR ASSY three serration screws (M 2 × 3) sled motor assy spring turn table spring stand Note: Never remove these parts since they were adjusted. stand Note: Place the stand with care not to touch the turn table.

  • Page 13: Optical Pick-Up Section

    WX-GT77UI/GT78UI/GT78UIM 3-11. OPTICAL PICK-UP SECTION optical pick-up section Note: Be careful not to touch the lens and hologram terminal when removing the optical pick-up section. 3-12. OPTICAL PICK-UP tapping screw (P 1.4) leaf spring (OPS) rack optical pick-up lead screw assy...
  • Page 14 WX-GT77UI/GT78UI/GT78UIM MEMO...

  • Page 15: Diagrams

    WX-GT77UI/GT78UI/GT78UIM SECTION 4 DIAGRAMS 4-1. BLOCK DIAGRAM – MAIN Section – ELECTRONIC VOLUME SUB OUT IC401 (MONO) J901 (1/2) 1 BUS-L OUT-SL AUDIO IN R-CH 2 BUS-R REAR R-CH J901 (2/2) R-CH AUDIO R-CH ZAP BEEP JAC1 I2C BUS CONTROLLED...

  • Page 16: Block Diagram -Display Section

    WX-GT77UI/GT78UI/GT78UIM 4-2. BLOCK DIAGRAM – DISPLAY Section – SYSTEM CONTROL LCD DRIVER,LED CONTROL IC501 (2/2) KEYIN1 KEY MATRIX LCD_SO • • S2–13,15–21,250 LCD_SCK KEYIN0 LCD_CE LCD1 • • LIQUID 46 KEYACK1 CRYSTAL DISPLAY • • PANEL COM1 PANEL+B COM4 D52,55,56,59,60,...
  • Page 17 WX-GT77UI/GT78UI/GT78UIM THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. • Waveforms (In addition to this, the necessary note is printed in each block.) – MAIN Board – For Printed Wiring Boards: For schematic diagrams: Note: Note: IC001 (XTAL1) •...

  • Page 18: Printed Wiring Board -Main Section

    WX-GT77UI/GT78UI/GT78UIM 4-3. PRINTED WIRING BOARD – MAIN Section – • : Uses unleaded solder. J901 AUDIO OUT BUS IN REAR FRONT SUB OUT J701 (MONO) MAIN BOARD (REMOTO IN) J601 (BUS CONTROL IN) C305 C304 CN701 (CHASSIS) C302 R921 R922...

  • Page 19: Schematic Diagram -Main Section (1/3)

    WX-GT77UI/GT78UI/GT78UIM 4-4. SCHEMATIC DIAGRAM – MAIN Section (1/3) – • See page 27 for IC Block Diagrams. MAIN BOARD (1/3) IC B/D IC301 IC301 I2C BUS CONTROLLED POWER AMP/MULTIPLE TDA8588AJ/N2/R1 VOLTAGE REGULATOR CN701 D311 D312 C303 1A4-A2 1A4-A2 FRONT L-CH...

  • Page 20: Schematic Diagram -Main Section (2/3)

    WX-GT77UI/GT78UI/GT78UIM 4-5. SCHEMATIC DIAGRAM – MAIN Section (2/3) – • See page 17 for Waveforms. • See page 28 for IC Block Diagrams. J901 SUB OUT AUDIO OUT (MONO) FRONT REAR AUDIO IN R3,15,16 IC B/D IC001 (CHASSIS) (US) (EXCEPT US)

  • Page 21: Schematic Diagram -Main Section (3/3)

    WX-GT77UI/GT78UI/GT78UIM 4-6. SCHEMATIC DIAGRAM – MAIN Section (3/3) – • See page 17 for Waveforms. • See page 30 for IC Block Diagrams. • See page 31 for IC Pin Function Description of IC501. (Page 19) (Page 20) MAIN BOARD (1/3)

  • Page 22: Printed Wiring Board -Sub Section

    WX-GT77UI/GT78UI/GT78UIM 4-7. PRINTED WIRING BOARD – SUB Section – • : Uses unleaded solder. SUB BOARD (SIDE A) D256 D255 D257 D258 D255,256, D252,254 D251,253 S250 (CD SLOT-L) D257,258, (CD SLOT-R) S250 (Page 25) (Page 18) KEY BOARD CN1 MAIN BOARD CN902...

  • Page 23: Schematic Diagram -Sub Section

    WX-GT77UI/GT78UI/GT78UIM 4-8. SCHEMATIC DIAGRAM – SUB Section – SUB BOARD D253,254,256 R261 SML-D12D8WT86SQ (GT78UI/GT78UIM) R251 R255 R259 (GT78UI/GT78UIM) 1.2K 1.8K 1.8K SML-D12P8WT86SJ (GT77UI) (GT77UI) R252,253 1.2k (GT78UI/GT78UIM) (GT77UI) D251,253 R256,257 (CD SLOT R) 1.5k (GT78UI/GT78UIM) (GT77UI) RESET RESET ILL+B LCD-CLK...

  • Page 24: Printed Wiring Board -Key Section (1/2)

    WX-GT77UI/GT78UI/GT78UIM 4-9. PRINTED WIRING BOARD – KEY Section (1/2) – • : Uses unleaded solder. KEY BOARD (SIDE A) D63,65,S15 D75,77,S12 SRC/SOURCE 66º D55,57,S17 ALBM/ D87,88,S16 PRESET (LCD BACK LIGHT) D64,66,S2 D76,78,S11 MODE D79,81,S10 D56,58, 3/REP D60,62,S18 SEEK + (LCD BACK LIGHT)

  • Page 25: Printed Wiring Board -Key Section (2/2)

    WX-GT77UI/GT78UI/GT78UIM 4-10. PRINTED WIRING BOARD – KEY Section (2/2) – • : Uses unleaded solder. KEY BOARD (SIDE B) R100 PUSH DIAL SELECT (VOLUME) R102 R101 GT77UI JAC1 SUB BOARD CN3 (Page 22) WX-GT77UI/GT78UI/GT78UIM...

  • Page 26: Schematic Diagram -Key Section

    WX-GT77UI/GT78UI/GT78UIM 4-11. SCHEMATIC DIAGRAM – KEY Section – KEY BOARD D57,58,61,62,65,66,69,70,73,74,77,78,81,82,85,86 R61,62,65,66,69,70,73,74,77,78,81,82,85,86,89,90 R57,58 D54,88 TSOP4840SB1 SML-D12P8WT86SJ (GT77UI) (GT77UI) (GT77UI) SML-D12P8WT86SJ (GT77UI) REMOTE CONTROL SML-D12D8WT86SQ (GT78UI/GT78UIM) 1.2k (GT78UI/GT78UIM) (GT78UI/GT78UIM) SML-310DTT86 (GT78UI/GT78UIM) SIGNAL RECEIVER D55,57 D59,61 D63,65 D87,88 ALBM/ ALBM/ D67,69 D71,73...
  • Page 27 WX-GT77UI/GT78UI/GT78UIM • IC Block Diagrams IC301 TDA8588AJ/N2/R1 (MAIN Board (1/3)) I2C_SIO OUT-FL– C BUS I2C_SCK OUT-FL+ OUT-RL– P-GND1 OUT-RL+ IN-RL IN-FL S-GND PROTECTION/ DIAGNOSTIC IN-FR IN-RR BEEP OUT-RR+ P-GND3 OUT-RR– OUT-FR+ STANDBY/ MUTE OUT-FR– CHIP DETECT/ P-GND4 DIAGNOSTIC BATTERY TEMPERATURE...
  • Page 28 WX-GT77UI/GT78UI/GT78UIM IC601 BA8271F-E2 (MAIN Board (1/3)) BUS ON BUS_ON SWITCH RESET SWITCH BUS_IN CLK_IN BATTERY BATT BU_CHECK SWITCH VREF DATA_I/O DATA_IN DATA_OUT IC001 TEF6607T/V4/S470,518 (MAIN Board (2/3)) AMRFIN 1 AMSELOUT2 AMSELOUT1 AMRFDEC 2 TUNER AMIFAGC1 FMIN2 3 AMSELIN2 TUNER FMIN1 4...
  • Page 29 WX-GT77UI/GT78UI/GT78UIM IC401 BD3447AFV-E2 (MAIN Board (2/3)) I2C BUS LOGIC, FADER FADER FADER FADER FADER EFFECT 180°/0° 7 BAND 3 BAND P-EQ (TONE CONTROL) SPECTRUM ANALYZER /LEVEL METER VOLUME/MUTE LVL METER SPEANA LVL METER SPEANA INPUT GAIN INPUT SELECTOR (3 SIGLE-END AND 3 STEREO IS O)
  • Page 30 WX-GT77UI/GT78UI/GT78UIM IC801 TPS40200DRG4 (MAIN Board (3/3)) UVLO ISNS DRIVER LOGIC E/A AND SS REFERENCE SOFT-START OVERCURRENT 700mV COMP ENABLE E/A IC802 TPS2051BDRG4 (MAIN Board (3/3)) CHARGE PUMP CURRENT DRIVER LIMIT UVLO THERMAL SENSE IC803 TC7WH123FU(TE12R) (MAIN Board (3/3)) RX/CX...
  • Page 31 Ground – Regulator reference capacitor connecting pin UNISI SONY-BUS data input UNISO SONY-BUS data output UNISCK SONY-BUS clock signal output Not used. (Open) I2C_SIO I2C serial data input/output I2C_SCK I2C serial clock signal output Not used. (Open) ACC_IN Accessory power supply detect signal input...
  • Page 32 WX-GT77UI/GT78UI/GT78UIM Pin No. Pin Name Description WAKE_UP CD mechanism deck micon wake up signal output MC_RX MC-BUS communication and CD mechanism deck micon communication RX input MC_TX MC-BUS communication and CD mechanism deck micon communication TX output Flash programming serial clock signal output...

  • Page 33: Exploded Views

    WX-GT77UI/GT78UI/GT78UIM SECTION 5 EXPLODED VIEWS Note: • -XX and -X mean standardized parts, so • The mechanical parts with no reference The components identifi ed by mark 0 they may have some difference from the number in the exploded views are not sup- or dotted line with mark 0 are critical for original one.

  • Page 34: Front Panel Section

    WX-GT77UI/GT78UI/GT78UIM 5-2. FRONT PANEL SECTION not supplied not supplied JAC1 not supplied not supplied LCD1 not supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-274-885-01 HINGE (FUNC) 3-274-877-01 RUBBER (VOL) 3-274-884-11 BUTTON (FUNC) 3-274-876-11 KNOB (VOL)

  • Page 35: Main Board Section

    WX-GT77UI/GT78UI/GT78UIM 5-3. MAIN BOARD SECTION not supplied FU601 MG-101Z-188//Q not supplied not supplied not supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-376-464-11 SCREW (+PTT 2.6X6), GROUND POINT 1-833-972-11 CONNECTION CORD FOR AUTOMOBILE A-1706-297-A MAIN BOARD, COMPLETE (EXCEPT US)

  • Page 36: Cd Mechanism Section (Mg-101Z-188//Q)

    WX-GT77UI/GT78UI/GT78UIM 5-4. CD MECHANISM SECTION (MG-101Z-188//Q) not supplied not supplied not supplied not supplied not supplied not supplied not supplied not supplied not supplied not supplied not supplied not supplied Ref. No. Part No. Description Remark Ref. No. Part No.

  • Page 37: Electrical Parts List

    WX-GT77UI/GT78UI/GT78UIM SECTION 6 ELECTRICAL PARTS LIST Note: • Due to standardization, replacements in • COILS When indicating parts by reference num- uH: μH the parts list may be different from the ber, please include the board. parts specifi ed in the diagrams or the com- •...
  • Page 38 WX-GT77UI/GT78UI/GT78UIM Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 6-502-195-01 LED SML-D12D8WT86SQ (4/SHUF) 1-216-809-11 METAL CHIP 1/10W (GT78UI/GT78UIM) 1-216-822-11 METAL CHIP 1.2K 1/10W 6-502-325-01 LED SML-D12P8WT86SJ (4/SHUF) (GT77UI) 1-216-857-11 METAL CHIP 1/10W 6-502-212-01 LED SMLE12BC7TT86M (5/DM+)
  • Page 39 WX-GT77UI/GT78UI/GT78UIM MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-216-051-00 METAL CHIP 1.2K 1/10W 1-786-653-11 SWITCH, TACTILE (> M SEEK +) (GT78UI/GT78UIM) 1-786-653-11 SWITCH, TACTILE (. m SEEK –) 1-216-045-00 METAL CHIP 1/10W 1-786-653-11 SWITCH, TACTILE (ALBM/PRESET –)
  • Page 40 WX-GT77UI/GT78UI/GT78UIM MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C313 1-115-340-11 CERAMIC CHIP 0.22uF C804 1-107-826-11 CERAMIC CHIP 0.1uF C314 1-100-352-11 CERAMIC CHIP 1uF C805 1-164-315-11 CERAMIC CHIP 470PF C316 1-162-970-11 CERAMIC CHIP 0.01uF C806...
  • Page 41 WX-GT77UI/GT78UI/GT78UIM MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark D502 6-501-193-01 DIODE 1SS355WTE-17 JR13 1-216-296-11 SHORT CHIP D503 6-501-743-01 DIODE MAZ8068GMLS0 JR14 1-216-296-11 SHORT CHIP D505 6-501-193-01 DIODE 1SS355WTE-17 JR15 1-216-295-11 SHORT CHIP D601 6-501-782-01...
  • Page 42 WX-GT77UI/GT78UI/GT78UIM MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < TRANSISTOR > R218 1-216-864-11 SHORT CHIP R220 1-216-801-11 METAL CHIP 1/10W Q201 8-729-027-23 TRANSISTOR DTA114EKA-T146 R221 1-216-801-11 METAL CHIP 1/10W Q501 8-729-027-23 TRANSISTOR DTA114EKA-T146 R301...
  • Page 43 WX-GT77UI/GT78UI/GT78UIM MAIN SERVO Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R554 1-216-845-11 METAL CHIP 100K 1/10W R906 1-216-833-11 METAL CHIP 1/10W R556 1-216-829-11 METAL CHIP 4.7K 1/10W R907 1-216-813-11 METAL CHIP 1/10W R557 1-216-829-11 METAL CHIP 4.7K...
  • Page 44 WX-GT77UI/GT78UI/GT78UIM Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < RESISTOR > 4-132-825-21 MANUAL, INSTRUCTION (ENGLISH,SPANISH) (US) 1-216-820-11 METAL CHIP 1/10W 4-132-827-01 COLLAR (GT78UIM) (GT77UI) ************************************************************* R251 1-216-822-11 METAL CHIP 1.2K 1/10W PARTS FOR INSTALLATION AND CONNECTIONS...
  • Page 45 WX-GT77UI/GT78UI/GT78UIM MEMO...
  • Page 46 WX-GT77UI/GT78UI/GT78UIM REVISION HISTORY Checking the version allows you to jump to the revised page. Also, clicking the version at the top of the revised page allows you to jump to the next revised page. Ver. Date Description of Revision 2009.01...

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